Dr. John N. Diana, M.D.

Specialty: Joint Replacement Specialist

Medical School: Indiana University School of Medicine

Internship: Orthopaedic Surgery Internship, Hospital of the University of Pennsylvania

Residency: Orthopaedic Surgery Residency, Hospital of the University of Pennsylvania (Chief Resident of Orthopedic Surgery and recipient of the DeForest Willard Award, the highest honor that can be bestowed upon a graduate)


Certified MAKOrobotic surgeon for knee and hip replacements and Chief of the Hip Division at the Coon Joint Replacement Institute

Dr. John Diana is a leading provider of joint replacement surgery in the Bay Area. Specializing in hip and knee replacements, Dr. Diana performs over 600 joint replacement surgeries each year and teaches anterior hip replacement techniques as well as MAKO robotic knee replacement procedures to surgeons from all over the U.S. and Asia.

For the knee, Dr. Diana performs: robotically-assisted total knee replacement, robotically-assisted partial knee replacement, computer navigated knee replacement, quadriceps-sparing minimally invasive knee replacement, and revision knee replacement surgery.

For the hip, Dr. Diana performs Birmingham hip resurfacing arthroplasty, direct anterior hip replacement surgery, and revision hip replacement surgery.

Committed to providing the highest technology available improving outcomes for patients, Dr. Diana supports MAKO robotic knee replacement procedures and robotic technology. Throughout the country, he teaches labs for surgeons to learn this technology. Robotic technology has the ability to improve surgical planning, offer additional tools to assess alignment, yield quantitative information to enhance ligament balance, and lessen the incidence of soft tissue injury.

Using the Direct Anterior Approach hip replacement (DAA) for over 10 years and for most of his surgeries, Dr. Diana developed extensive experience allowing his patients to enjoy the amazing benefits of this surgery. Specifically, anterior approach hip replacement can:

  • Result in enhanced stability, allowing no “hip precautions” in the postoperative period usually instituted with posterior approach replacement techniques
  • Allow the surgeon to take intraoperative x-rays to improve the accuracy of position of the components
  • Decrease time spent using assistive devices postoperatively such as a walker/cane
  • Offer a muscle-sparing path to enter the hip joint without disconnecting any deep tendons
  • Eliminate the need for special items like elevated toilet seats and reaching tools postoperatively

The non-profit organization ProPublica has recognized Dr. Diana for his high quality and exceedingly low adjusted complication rate for hip replacement in the region. He is also listed in the 2018 Sonoma Magazine as a “Top Doc.”

Dr. Diana’s Adusted Complication Rate Chart for hip replacements is as follows:
Source: https://projects.propublica.org/surgeons/surgeons/1649297540#procedure-section-8151
Dr. Diana has performed more than 2500 hip replacements and over 4000 knee replacements. He enjoys teaching techniques and discussing new innovations with colleagues all over the U.S. He is an active member of:

  • The American Academy of Hip and Knee Surgeons (AAHKS)
  • The American Academy of Orthopaedic Surgeons (AAOS)
  • The Napa and Solano County Medical Society
  • The USA Track and Field (USATF)
  • Non-profit research for the Western States Endurance Run (Director)

He enjoys traveling and has performed volunteer medical services in both Guatemala and Kenya. Dr. Diana also enjoys spending time with family and long distance running, having completed both Western States 100 mile endurance run, the San Diego 100 mile endurance run, and both the CCC and TDS UTMB races in Chanoix, France. Dr. Diana has completed the Napa Valley Marathon, the California International Marathon, and the Chicago Marathon on multiple occasions.

"I consider this nothing short of a miracle."

I have always had a very active life style and was growing increasingly frustrated when painful and undependable knees forced me to restrict my activities…

"Having hip surgery may have been one of my best decisions to date"

I was living with everyday hip pain at about level 6 with frequent spikes to 9+ (on scale of 1 to 10.) It was the worst when I went from lying or sitting down, to getting up and moving…

Want to make an appointment?

We are now offering Telemedicine appointments (Virtual Visits). That’s right, you can now see our Orthopaedic Specialists and Pain Management Physician from the comfort of your own home via cell phone, tablet, or computer. You will sit in front of a camera where you will be able to see yourself and your Health Care Provider on the screen once your session begins. Our Telemedicine appointments are HIPPA compliant. Most insurances are now covering Telemedicine.

Phone: (707) 254-7117

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